/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/types.h>
#include <sys/smp_impldefs.h>
#include <sys/promif.h>

#include <sys/kmem.h>
#include <sys/archsystm.h>
#include <sys/cpuvar.h>
#include <sys/pte.h>
#include <vm/seg_kmem.h>
#include <sys/epm.h>
#include <sys/cpr.h>
#include <sys/machsystm.h>
#include <sys/clock.h>

#include <sys/cpr_wakecode.h>
#include <sys/acpi/acpi.h>

#ifdef OLDPMCODE
#include "acpi.h"
#endif

#include	<sys/x86_archext.h>
#include	<sys/reboot.h>
#include	<sys/cpu_module.h>
#include	<sys/kdi.h>

/*
 * S3 stuff
 */

int acpi_rtc_wake = 0x0;		/* wake in N seconds */

#if 0	/* debug */
static uint8_t	branchbuf[64 * 1024];	/* for the HDT branch trace stuff */
#endif	/* debug */

extern int boothowto;

#define	BOOTCPU	0	/* cpu 0 is always the boot cpu */

extern void		kernel_wc_code(void);
extern tod_ops_t	*tod_ops;
extern int flushes_require_xcalls;
extern int tsc_gethrtime_enable;

extern cpuset_t cpu_ready_set;
extern void *(*cpu_pause_func)(void *);

/*
 * This probably belong in apic.c, along with the save/restore stuff.
 */
static void
reinit_picmode(void)
{
	ACPI_OBJECT_LIST	arglist;
	ACPI_OBJECT		arg;
	ACPI_STATUS		status;

	/* Setup parameter object */
	arglist.Count = 1;
	arglist.Pointer = &arg;
	arg.Type = ACPI_TYPE_INTEGER;
	arg.Integer.Value = 1;

	status = AcpiEvaluateObject(NULL, "\\_PIC", &arglist, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		PMD(PMD_SX, ("Method _PIC failed, %d\n", status))
	}
}


/*
 * This is what we've all been waiting for!
 */
int
acpi_enter_sleepstate(s3a_t *s3ap)
{
	ACPI_PHYSICAL_ADDRESS	wakephys = s3ap->s3a_wakephys;
	caddr_t			wakevirt = rm_platter_va;
	/*LINTED*/
	wakecode_t		*wp = (wakecode_t *)wakevirt;
	uint_t			Sx = s3ap->s3a_state;

	PT(PT_SWV);
	/* Set waking vector */
	if (AcpiSetFirmwareWakingVector(wakephys) != AE_OK) {
		PT(PT_SWV_FAIL);
		PMD(PMD_SX, ("Can't SetFirmwareWakingVector(%lx)\n",
		    (long)wakephys))
		goto insomnia;
	}

	PT(PT_EWE);
	/* Enable wake events */
	if (AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, 0) != AE_OK) {
		PT(PT_EWE_FAIL);
		PMD(PMD_SX, ("Can't EnableEvent(POWER_BUTTON)\n"))
	}
	if (acpi_rtc_wake > 0) {
		(void) AcpiSetRegister(ACPI_BITREG_RT_CLOCK_STATUS, 1,
		    ACPI_MTX_DO_NOT_LOCK); /* clear the RTC bit first */
		PT(PT_RTCW);
		if (AcpiEnableEvent(ACPI_EVENT_RTC, 0) != AE_OK) {
			PT(PT_RTCW_FAIL);
			PMD(PMD_SX, ("Can't EnableEvent(RTC)\n"))
		}

		/*
		 * Set RTC to wake us in a wee while.
		 */
		mutex_enter(&tod_lock);
		PT(PT_TOD);
		TODOP_SETWAKE(tod_ops, acpi_rtc_wake);
		mutex_exit(&tod_lock);
	}

	/*
	 * Prepare for sleep ... could've done this earlier?
	 */
	PT(PT_SXP);
	PMD(PMD_SX, ("Calling AcpiEnterSleepStatePrep(%d) ...\n", Sx))
	if (AcpiEnterSleepStatePrep(Sx) != AE_OK) {
		PMD(PMD_SX, ("... failed\n!"))
		goto insomnia;
	}

	switch (s3ap->s3a_test_point) {
	case DEVICE_SUSPEND_TO_RAM:
	case FORCE_SUSPEND_TO_RAM:
	case LOOP_BACK_PASS:
		return (0);
	case LOOP_BACK_FAIL:
		return (1);
	default:
		ASSERT(s3ap->s3a_test_point == LOOP_BACK_NONE);
	}

	/*
	 * Tell the hardware to sleep.
	 */
	PT(PT_SXE);
	PMD(PMD_SX, ("Calling AcpiEnterSleepState(%d) ...\n", Sx))
	if (AcpiEnterSleepState(Sx) != AE_OK) {
		PT(PT_SXE_FAIL);
		PMD(PMD_SX, ("... failed!\n"))
	}

insomnia:
	PT(PT_INSOM);
	/* cleanup is done in the caller */
	return (1);
}

int
acpi_exit_sleepstate(s3a_t *s3ap)
{
	int Sx = s3ap->s3a_state;

	PT(PT_WOKE);
	PMD(PMD_SX, ("!We woke up!\n"))

	PT(PT_LSS);
	if (AcpiLeaveSleepState(Sx) != AE_OK) {
		PT(PT_LSS_FAIL);
		PMD(PMD_SX, ("Problem with LeaveSleepState!\n"))
	}

	PT(PT_DPB);
	if (AcpiDisableEvent(ACPI_EVENT_POWER_BUTTON, 0) != AE_OK) {
		PT(PT_DPB_FAIL);
		PMD(PMD_SX, ("Problem w/ DisableEvent(POWER_BUTTON)\n"))
	}
	if (acpi_rtc_wake > 0 &&
	    AcpiDisableEvent(ACPI_EVENT_RTC, 0) != AE_OK) {
		PT(PT_DRTC_FAIL);
		PMD(PMD_SX, ("Problem w/ DisableEvent(RTC)\n"))
	}

	PMD(PMD_SX, ("Restore state of APICs\n"))

	/* Restore state of APICs */
	PT(PT_ACPIREINIT);
	reinit_picmode();
	PT(PT_ACPIRESTORE);

	PMD(PMD_SX, ("Exiting acpi_sleepstate() => 0\n"))

	return (0);
}